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Perfil ecológico y estado demográfico de las poblaciones de desmán ibérico (Galemys pyrenaicus) del sistema Central

Год: 2019

Авторы: Valle-Artaza J.M., Fernández-González Á., Fernández-López J., Rodríguez G.N., Munné P.S., Menéndez P.D., Francesco R.L., Villar V.I., Fernández-Menéndez D.

Издание: Restaurarios. III congress iberico restauracion fluvial. P. 398‒403.

The Pyrenean desman (Galemys pyrenaicus), is one of our most emblematic aquatic species in the Iberian Peninsula.The populations of the Sistema Central are classified as endangered (EN) by national environmental authorities. The objective of this study was: 1) To perform a desman relict population demographic analysis in the Sistema Central. 2) To describe the ecological profile of the Pyrenean desman. This work was carried out over a three years period, (2017-2019). The population study took pi ace in the Adaja and Tormes rivers (Avila). On the other hand, desman habitat suitability was determines in several Sistema Central areas, (Francia Mountains (Salamanca), Gredos Mountains (Avila), Guadarrama Mountains (Segovia у Madrid) and Ayllon Mountains (Guadalajara)). A desman historical areas distribution without current presence-data, were taken into account too. Physico-chemical water parameters, hydromorphological assessment indices and trophic indices were considered. Desman and its predators feces prospection was carried out for a presence/absence determination. A sampling effort of 295 traps night and an intensive 21000 lineal meters trapping were needed to capture 33 individuals distributed in three sub-population nuclei. As a resultan average of 2,7 individuals/km and a total population estimation of 190 individuals, were obtained. Desman habitat suitability and limiting factors were identified. The Pyrenean desman could play a role as a refugee species because it is restricted to live in sub-optimal habitat due to river connectivity loss and its impossibility for optimal areas re-colonization

Тэги: River habitat; Global climate change; Mountain ecosystems; Refugee species